Apparatus for molding crescent fillers for tires.



No. 860,263. PATENTED JULY 16, 1907.

W. F. STBARNS. APPARATUS POR MOLDING CRESCENT FILLERS FOR TIRES.

' APPLICATION FILED AUG. 1904.

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nlm'. amil MWJ PATENTED JULY 16, 1907.

. W. E. STEAENS.

APPARATUS EOE MOLDING CRESCENT EILLERS EOE TIRES.

APPLICATION FIABD 1106.8, 1904.

4 SHEETS-SHEET 2.

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f No. 860,263.

PATENTED JULY 16, 1907. W. F. STEARNS.

APPARATUS FOR MOLDING CRESCENT EILLERS POR TIRES.

'APPLIOATION HLBD AUG. s. 1904.

4 SHEETS-SHEET 3.,

4 SHEETS--SHEET 4.

PATENTED JULY 16, 1907.

A M, M M w i Iii x1 1-11 W. I'. STBARNS. APPARATUS POR MOLDING CRESCENT PILLERS `FOR TIRES.

APPLICATION FILED AUG. B. 1904.

m m.. .I l l 1 c@ lll llllllll l 1 limited extent andv sporadically or experimentally;l

A no mechanically and commercially Nrrnn sfrafi'ss WILLIAM FRANcIs sfr APPARATUS FOR MOLDING CRESCENT FILLERS FOR r Specification of Letters Patent. Application filed August 8,1904.` Serial No. 219,810.

PATN '1 '111116K nARNs', or B11-rivm, Naw YORK.

admis.

Patented July 16, 1907.

To all'fwhom it may concern:

Be it known that I, WILLIAM FRANCIS S'rnARNs, a citizen of the United States, residing at Batavia, in the county of Genesee and State of New York, have invented certain new and useful Improvements in Apparatus for Molding Crescent Fillers for Tires, of which the following is a specification, reference being had therein to the accompanying drawing.

Figure 1 is a sideelevation of the machine, the hydraulic cylinder being broken off near its lower end. Fig. 2 is a top plan view of the machine. Fig. 3 is a view, `partly in top plan elevation, the cover being removed; and partly in horizontal section on line 3-3 of 1.' Fig. 4 is a vertical section on line 4--4 of Fig.`2. f

f Theobject of my invention is to produce a machine for efectively molding and properly giving fixed, crescent-like shape to fillers for tires, especially fillers oi the general construction shown in U. S. patents, Nos. 523,314 of July 17, 1894; 504,144 of 500,594 of, oet. 10, 1899; 514,790 or 521,005 of June 5, 1894; 521,006 ofJune 5, 1894; 526,840 ofOct. 2, 1894; 589,770 of Sept. 7, 1897; 634,92() of Oct. 17, 1899; 634,951 0f Dec'. 26, 1899; 654,278 of .luly 24, 1900; 074,43601'May 21,1901; 008,733 of Fetes, 1901, and 693,818 of Feb. 18, 1902, the latter to Haines and myself as assignors and wherein there is shown a crescent-shaped filler for the molding and vulcanizing of which in fixed form the lpresent machine is "well adapted. All such fillers have been heretofore shaped partly by hand and partly by air-pressure after being assembled in the tire-sheath with an inflatable pneumatic tire, the vulcanizing having been done at another Feb. 13, 1894;

- time, and the whole requiring several operations all of which are eliminated by my present method of molding, vulcanizing and shaping these fillers in fixedform According to my method, the cotton vor other tibers which constitute the stuffing of the phd are compacted under heavy pressure at the same time the fillers are shaped and vulcanized. Ileietofore,

' as l amlinformed, theylllers of the general type dislosed by'said patents have been made only to a very practicable wayof producing them for the market, in proper condition and with requisite economy, having been known.

In the drawings illustrating the principle of my invention and the bestmode now the saine, 1501A.

presentforimfis a known to me of applying l is' a reciprocating` plunger carrying a fixed cam .2, and moving through afguide, which, in the v smiling-box. l The plunger moves centrally-,through the aperture of an annular mold 4, supported horizontally on upright frame 5. Mold 4 is a half- `mold,and on its-inner, peripheral, horizontal sliding, segmental plunger-molds? and' are supported. I 'iheouter sur- Aug. 29, 1893;A

l faces of the plunger-molds 7 and 8 form a continuous annular pressing surface for the inner side ofthe filler x, when all of the plunger-molds are moved into their outer position, as indicated in the sectional part of Fig; 3. Plunger-molds 7, at their outer ends, are longer than are the outer ends of the plunger-molds S, these plunger-molds 7 and 8 alternating, the plungermolds 7 being first moved into their outer pressing position, and then being followed by the shorter plunger-molds 8, the ends 8 of molds 8 being inclined with reference to the opposed ends 7 of the` longer plunger-molds 7, so that molds 8 may-slide in between molds 7 after the latter are brought to their outermost pressing' position, and the outer peripheral surfaces of the molds 7 and 8 then form a pontinuous pressing'` surface, l v

Each mold 7 and 8 has a rearward forked` ug, radial to the centra-l vertical axis of plunger l, an carries at i its rear end,`i the fork, an anti-friction roll 9, loose on a pin 10, transversely mounted in the arms of the fork. The forked arms of the plunger-molds 7 are longer,-that is, extend nearer to plunger 1,-1than are the forked arms of the plunger-molds 8; and cam 2 has alternating vertical cam-ribs l() and ll, the caniribs 11 extending farther from plunger 1 than do the cam-ribs 10, which ,latter engage the rolls 9l 'f the plunger-molds 7, the cam-ribs ll engaging the rolls 9 ofthe molds 8, the alternating cam-ribs l() and ll. cooperating with the cam-rolls 9 of the alternating plunger-molds 7 and 8 to force all the plunger-molds 7 into @elgpositioineand then to slide the plungermolds 8 in between the plunger-molds 7 and into llnal pressing position. Each mold 7 and 8 has a chamber l2 supplied with heat lor vulcanizing through a supply pipe 13. A removable annular half mold 14, provided witlra central aperture and with an interior chamber 15 for vulcanizing heat, and heat-pipe 16 is provided and' formed with an annular molding surface 17, which is complementary to the moldingsuriace 18 of the half mold 4, and in the crescent-like space formed bythe walls 17 and 18 of the half molds 4 and 14 the filler x is placed for compression into fixed forni, and for vulcanination, Upper mold 14 is conveniently provided with eyes 2l for the reception of a lifting contrivauce whereby the upper mold 14 is lifted off the under half mold 4 when the filler is placed in ,and removed from mold position.

A ring-shaped plate 22 having radiating slots 22a from its inner periphery and having peripheral under shoulder 23 at its outer edge'is mounted in the annular space of the upper mold 14, the upper mold 14 having an inner peripheral shoulder 24 on which said shoulder 23 rests, so that the `ring 221s carried by mold 14 when the mold 14 is raisedgor lowered.` The under surface of ring,l 22 rests on'the'upper surfaces ot the pl unger-rnolds 7 and 8, and with the'under, inner ger-molds 7 and' 8,'wrli'1l1,l consequently, reciprocate" ai sedans on and betweensuch upper surfaces and the marginal suriaces of the lower niold, 4, anti-friction rolls 9"pro jectingfupwardly inslots 225.5 Each `plunger-mold.' T `and Sillas aand downwardly extending arm 25 (Fig. 4).projectilng into the annular 'openinaf-of un derrnolcl 4.' Each gg'carries a horizontal, out

Wsrdly entending gnideepin 26, surrounded, by a coiled;i

spring; 27, the inner end'oltre spring. abutting against the inner Wall of theferm 2 5 and the outer end-wall of' spring-rearriving chamber 28, Witlr which frame 5 is provided. Springs 27 automatically push Vplungerniolds 7 and 8-i1iwardly when cani 2 ceases torrestrain their inward movement. Armv25-are conveniently made in separate pieces from molds -7 and 8, and clamped thereto by bolts 29. Molds 4 and v14 are clamped together during the time oi the moldingand Vulcanizing operations conveniently by means4 of hinged bolts 30 on under mold 4, which lits into bolts between outward lugs 3l on upper die 14, clamp-nuts 32 being provided ior bolts 30 tohold the vboltsin place and molds 4` and 14 tightr together.

Plungenniolds 7 and 8 may, of course, 'be reciprocated in various mechanical ways, and m-y invention is not limited vto any particular wpparatus for either moving the plunger-molds forwardly or retracting them', In the present construction, the plunge-lnolds 7 and 8 aifemoved. forwardly by cam 2 through the instrumentality of the plunger l, which is s.v piston-Candler, being provided withpiston @which moves-in: a piston,- charnber 4l, provided onone sidc oi theI viston with'a port-42, and on. the other`side witha port. 43.. As shown-iii Fig. l., pliingerfmolds 7 and 8 arefin their .42'- i l outermost' pressing posrtronfand cam 2 1n pressing position against the anti-friction Iolls9. After the iller.'`

has been moldedand vulcanized, the upper mold I4 is lifted-.to a proper heightf-carrying -with it ring 22,5-4

and 'then pressure is admitted through the'port 43 `against'piston 40, which then carries plunger-1 and earn 2' upwardly through the annular sparse o lower mold 40, the cam surfaces ll being lso shaped as to' permit the short mold 8 to move inwardly `before' the l longer molds 7 move inwardly. This is-a-ccomplished,

inthe present construction, by providing cam-ribs ll with a short, vertical cameurace which passes itspposed roll 9l before the longer, vertical cam-surfaces 5l of the cam-ribs 10 pass out of engagement with the iolls 9 of the Aplunger-molds7 (See Fig. 4.)

lullig. 4, the liller :l: is merely. indicated as a horno-l` geneous structure, and the apparatusmay be used for` of alternatelynrranged radiating long and-short camwibs;

and means whereby said cam-ribs may cooperate with the plunger molds, respectively, whereb'y the said ribs drive the plunger molds into .coperation with the annular molds. f

ln testimony whereof I ax my signature in presence of two witnesses.

WILLIAM FRANCIS STEARNS. vTwo witnesses:

EDWARD S. BEACH,

E. A. ALLEN; 

